Regulating apparatus.



J. M. DOUGHERTY a H. C. TABLBR.

REGULATING APPARATUS.

APPLIGATION FILED M547, 1909.

957,601 Patented May 10,1910.

T0 SEWER.

noon o aaai JHN IM. .'U'GHERTY AN HARRY G. TAELER, 0F

ST, LOUIQ. TWESSOURI.

REGLATING PRATUS.

sensei.

Specification of Letters Patent.

Patenteill May it?, 19t@ Application tiled March l?, i909.l VSerial No.483,946.

To all whom 'it may concern:

Be it known that we, Jenn M. Denonnnrr and HARRY C. Tannen, citizens otthe United States, residing at Slt. Louis, Missouri, have invented avcertain new and useful Improvement in ltegulating Apparatus, of whichthe following ie a full, clear, and exact description, such as' willenable others skilled in the art to which it appertains to make and usethe same, reterence being had to the accompanying drawings, forming partet this specitication, in which the iig ure is a side elevational view,part-ly in section, of our improved regulatii'ig apparatus.

This invention relates to a new and useful in'iprovement in regulatingapparatus designed particularly tor controlling the drafts of furnaces,the apparatus being operated by compressed gases whose pressure isvdependent. upon the ten'iperature ot the heatine` medium sent out fromthe furnace. It is obvious, as will be seen from the further descriptiono t' our invention, that our improved regulating apparatus is useful inconnection 1vith the control of valves or de-` vices other than thedainpers ot furnaces.

In the drawings, l indicates the furnace, which is provided with theusual tiring door 2 and the ash-pit door 3, the latter ot which controlsthe draft to the ti'trnace.

4f is a pipe for comino-ting the products of combustion te the chimney,said pipe being provided with a door 5 'which is designed, when open, toadmit', cold air into the pipe whereby the draft'. is reduced, and whenclosed to increase the draft, in etl'ect, by permitting the supply ofdrawn into the chimney to be drawn wholly trom above the tire-pit in thefurnace.

A cable G is connected to the door 5 and passes Aover pulley 7 and 8 tolever tl. A cable l0 connects lever 9 tothe door 5S. lVhen the end oitlever 9, to which these cables are connected, is lowered. the door 3 isclosedfand the door 5 opened., which results in not only shutting ottthe supply ot oxygen to the tire-pot, but also in admitting cold airinto the chimney so as to red uce the cold draf-t thereof. When lever flis raised, door 3 is opened to admit oxygei'i to support combustion ofthe fuel in the lire-pot and the door 5 is closed to increase the dra'ttof thecliimney. liever 9 is counter-balanced by a Weight ll, said leverbeing tulcrumed l2 to a suitableiixcd support. The hotuiater Whichisheatedl'in the furnace is sont out to the radiators in the building`through a distributing pipe 13 leading trom the top ot the boiler, thewater, after radiating` its heat, returning through pipe lll, whichcommunicates to the lower portion of the boiler. n u

l5 indicates a clean-out pipe leading trom the bottom ot the boiler tothe seiner tor nell-understood purposes.

itl is a pipe leading trom the het water pipe back to the lower or coldwater side ol. the boiler, said pipe being provided with a valve i? anda branch pipeltl leading into a tank or chamber l5). provided with theusual water gage for wellunderstood purpose. From the upper end 'of thetank leads a pipe 20 connnmiicating with a reservoir 2l, said reservoirconnected by pipe 2Q to chamber above the diaphragm 23, said diaphragmbeing connected by suitablt` plunger @fl to thev lever tl. ,instead `etcoi'mnunicating with the chamber above the diaphragm, pipe 22 can leadinto a, bellows or piston cl'iau'lber, whereby the pressure admittedinto said chamber, like the pressure admitted above the dia'plnagm, willcause the movable. wall ot the chamber to operate the part. or elementconnected thereto. he pipe iti has another branch leading into what,lmoivn as a trap, constituningv a safety device tor relieving the systemot en* cess pressure. This trap comprisesa casing 26 having va reducedlower end into which the pipe 25 extends, said reduced lower end beinglille-d with mercury, which constitutes :i column, the lheight otVwhich, ouiuicoluit oif the hydrostatic pressure exerted, controllingthe pressure in pipe 25. in pipe exceeds the hydrostatic pressure otcolumn in mercury, then pipe Q5 relieves itseliu by blowing.through thecolumn ot mercury and out through a discharge pipe Q7 leading trom theupper cnd'o'l casing lo to the seivcr.. 'lhcy inner end of pipe is inthe 'form ot a uloditied goosencel: trap, the upper end being open andthe lower portion oit' the gooseueck termimitiug in a te; 'i throughwhich mercury, which may splash into the upper open end otpipe QT, mayiind its way back into the chamber 26. 1

rlhe operation et our improved regulating apparatus is as follows:Assuming that the height ot thecolumn o1 mercury in the casinglt isfixed .tor a predetermined pressure above which the system Will blow off7 and that .tire is started' under the boilerl@ The lhis 'tank lt) maybe4 lWhen the pressure,

valve 1T is closed beforelivater is admittled to the system, to chargethe tank manually or tofore the air in the upper' part ot the boilerdown through the circulation pipe lo and up into the tank 19 andyreservoir :21 so as to trap as much air as possible. After this thevalve 17- is opened, which will permit the water totiow into the lowerportion of tank 19, acting to compress the liuid in said tank. As thewater becomes heated, the gases therein espand and as the system isclosed, that is, there is no open expansion tank at the top ot' thesystem, in the so-called open systems, the expanding gases act. todisplace the water, and its only room for expansion is in the tank 19.As the water becomes heated. it therefore rises in tank 19, as the fasesin the water expand and the pressui'e ot the gases trapped in tank 19will act upon the diaphragm 23, causingv it to exert its pressure onlever 9 so as to lepress the end of said lever to which the Cables 6 andl0 are connected. This lowering of lever 9 will close the door i andopen the door 5, which will result in shutting the drafts, making a tcooler tire. By adjusting the weight 11 along the oppositeend ot lever9, which opposite end is preferably I tons operating in chambersprovided with a scale, lever 9 will be operated by a diaphragm can beregulated to a nicety. The device is thus rendered responsive toditt'erent temperatures required according to the position ot' weight11.- ()f course cables and lt) may be shortened or lengt tened asoccasion requires, it' desired. The mercury trap which operates as asafety device, will, in the event ol' the water in the systembecomingtoo hot, blow oit and relieve the system. Should there be aleakage around the diaphragm so as to permit the escape ot the gasestrapped in the tank-p19, the rise ot'th-e water in tank 19 will'indicate that fact through the water gage. Reservoir 21 increases thecapacity ot tank 19 and also serves chamber for any moisture or water ofcondensation accumulating in the pipe Y lt is obvious that instead ot'having a diaphragm operatingr through a lever and cable connections, thedoors 5 and 3 could be opened and closed by directly connected pisinconnection with the pressure gases in tank 19.

7We believe that we are broadly new in the utilization ot' variablepressures on Huid-actuated devices in closed systems, said variablepressurcs being employed l'or regulating purposes.

We are aware that minor (,:bangcs in the construction, arrangeimnt andcombination the point at which as is common i i i l l l as a collecting'l. l'In a regulating appa atus, the combination with a boiler in aclosed heating system, said boiler delivering hot water to an outgoingdistributing pipe and receiving cold water from an incoming collectingpipe, a pipe short-circuiting said outgoing and incoming pipes. achamber connected to said short-circuiting pipe t'or receiving water atvarying degrees amlpressures, said water exercising varying pressuresupon gases trappedin the upper portion ot said chamand means operated bythe trapped gases in said tank for regulating said heat-generatingmedium.

2. In a regulating apparatus, the combination with a boiler in a closedheating system, said boiler delivering hot water to an outgoingli:-.tributing pipe and receiving cold water from an incoming collectingpipe, a pipe short-cireuitiiig said outgoing and incoming pipes, a tankconnected to said shortcircuiting pipe t'or receiving water at varyingdegrees and pressures, said water engercising varying pressures upongases trappe in the upper portion ot' said tank, a heatgenerating mediumior the boiler, means operated by the trapped gases in said v tank forregulating said heat-generating medium, and a mercury trap connectedcircuiting pipe whereby excess pressures from the system may berelieved.

l). ln a regulating apparatus for closed heating systems, thecombination with a water heater of a pipe leading from the maindistributing pipe of the system to the boiler, a closed chamberconnected to said pipe and adapted to receive hot water from the heatingsystem, which water traps and compresses air in the'upper portion of theclosed chamber, a regulating device connected to the intake, and checkdraft of the. water heater and a translating apparatus to said shortber,a heat-generating medium for the boiler,

vln testimony whereot', we hereunto atlix our signatures m thc )resenceotl two witnesses, this 15th day ot March, 1909.

JOHN M. DOUGHERTY. .HARRY C. TABLER.

Witnesses: y

F. R. Conn wam. t. Lenola: CLARK.

